CN105115393A - Air gap measurement feeler gauge for rotor of water turbine generator set, and application method of air gap measurement feeler gauge - Google Patents
Air gap measurement feeler gauge for rotor of water turbine generator set, and application method of air gap measurement feeler gauge Download PDFInfo
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- CN105115393A CN105115393A CN201510261756.6A CN201510261756A CN105115393A CN 105115393 A CN105115393 A CN 105115393A CN 201510261756 A CN201510261756 A CN 201510261756A CN 105115393 A CN105115393 A CN 105115393A
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- sliding sleeve
- clearance gauge
- air gap
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- seat
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Abstract
The invention discloses an air gap measurement feeler gauge for a rotor of a water turbine generator set, and solves problems of multiple artificial accumulative errors caused by that a mark is set on a feeler gauge through chalks and then a vernier caliper is used for measurement and reading during the measurement of a rotor air gap. The feeler gauge comprises a dial indicator and a hollow feeler gauge seat, wherein the dial indicator is fixed at the upper end of the feeler gauge seat through an adjustment support, and a measuring rod and a measuring head of the dial indicator stretch into the feeler gauge seat. The lower end of the feeler gauge seat is provided with a wedge-shaped measurement part which is inserted into a gap for measuring depth. The interior of the feeler gauge seat is provided with a sliding part which cooperates with the wedge-shaped measurement part. The sliding part is located below the measuring rod and measuring head of the dial indicator, and can make up-down linear movement relative to the feeler gauge seat. The feeler gauge is simple in structure, is convenient to implement, and is low in cost. Compared with the prior art, the feeler gauge is novel and creative, is very high in practical value, and lays a solid basis for the large-scale popularization and application.
Description
Technical field
The present invention relates to a kind of direct reading mechanical air clearance measurement clearance gauge, specifically, relate to a kind of rotor airgap being applicable to large capacity hydroelectric generator group and measure clearance gauge and using method thereof.
Background technology
Generator stator-rotator air gap is an important electromagnetic parameter, and operating power generator air gap homogeneity directly affects its electrical specification and stable mechanical performance.Because the factors such as manufacture, installation and stator, rotor structures parts are subject to the effect of electromagnetic force and centrifugal force, the air gap value that design is selected can change in units' installation, operation later, uneven air gap will directly affect the electrical specification of generator and the stable of mechanical property, and traditional clearance gauge and measuring method cannot provide accuracy data.
Usual measurement rotor airgap should be selected in the place of center of arc of each magnetic pole, and large sized unit will be measured respectively in the upper and lower of rotor.In prior art, measuring appliance generally adopts the oblique chock of wooden wedge shape ruler or steel, measuring appliance inclined-plane fills colored chalk dust, its inclined-plane being inserted facing to stator core surface, when inserting motionless, transfering to chock, with thickness vernier caliper measurement clearance gauge having scratch part, namely be clearance in addition, but there is very large measuring error in this measuring method.
On the other hand, to go into operation at present, increasing at the Large Hydroelectric Set single-machine capacity built, 600-700MW generator amature kind of air-gap design value is about 30mm, and conventional small-range clearance gauge does not meet measurement of air gap requirement.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, provide a kind of structure simple, realize convenient and the rotor airgap being applicable to large capacity hydroelectric generator group measures clearance gauge.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of hydroelectric generating set rotor measurement of air gap clearance gauge, comprises dial gauge, the clearance gauge seat of hollow, and described dial gauge is fixed on described clearance gauge seat upper end by regulating support, and it is inner that the gauge rod of described dial gauge and gauge head portion stretch to described clearance gauge seat;
Described clearance gauge seat lower end is provided with the wedge shape measurement section for inserting clearance measurement depth location;
Be provided with in described clearance gauge seat inside with described wedge shape measurement section with the use of sliding part, described sliding position in described dial gauge gauge rod and survey lower head and can move linearly up and down relative to described clearance gauge seat.
Specifically, described wedge shape measurement section comprises wedge block, slide rule groove and tooth bar; Described slide rule groove is fixedly connected on described clearance gauge seat lower end and is communicated with described clearance gauge seat inside, and described wedge block inserts in slide rule groove, and be connected to one structure, the other end of one end of described tooth bar and described wedge block stretches to described clearance gauge seat inside; Described wedge shape measurement section by described tooth bar and described sliding part with the use of.
Simultaneously, described sliding part comprises that to be arranged at described clearance gauge seat inner and be positioned at the gauge rod of described dial gauge and survey lower head and sliding sleeve in inverse u shape, the side inwall of described sliding sleeve vertical direction is provided with the internal tooth of bar shaped, described tooth bar is connected by the internal tooth of gear pair with described sliding sleeve, and described sliding sleeve is also provided with the sliding sleeve operating grip that one end extends to described clearance gauge seat outside.
Further, described sliding sleeve keeps relative fixing by lock-screw with described clearance gauge seat.
Further, the lower position block being arranged at described clearance gauge seat inside and being positioned at the upper limit position block above described sliding sleeve and being positioned at below described sliding sleeve is also comprised.
Further, the horizontal base of described sliding sleeve also offers the through hole that can penetrate for described tooth bar.
Further, the internal tooth of described sliding sleeve operating grip and described sliding sleeve is positioned at homonymy.
Preferably, described gear pair is single gear transmission, ratio of gear i=0.1.
Preferably, the featheredge thickness of described wedge block is 10mm, and gradient is 1:10; The chute thickness of described slide rule groove is 10mm.
A using method for hydroelectric generating set rotor measurement of air gap clearance gauge, comprises the following steps:
(1) before measuring, carry out zero-bit adjustment: the operating grip promoting sliding sleeve downwards, moves to the position of lower position block by sliding sleeve, after regulating dial gauge to keep 40mm decrement, dial gauge pointer is to zero;
(2) when measuring, find rotor magnetic pole center accurately, the inclined-plane of wedge block is aligned stator core, insert slide rule groove to clearance measurement depth location, now, wedge block does not contact with stator core measuring surface, the upwardly operating grip of sliding sleeve, moved linearly downwards in slide rule groove by gear pair, rack drives wedge block, after magnetic pole and stator core surface of contact are close in the slide rule groove back side and wedge block inclined-plane, to tighten after lock-screw reading on dial gauge.
Compared with prior art, the present invention has following beneficial effect:
(1) wedge block and slide rule groove are combined into the wedge shape survey mass of an energy relative sliding by the present invention, the relative linear displacement of wedge block in slide rule groove, sliding sleeve is driven to move up and down by rack drives gear pair by ratio of gear, then a millimeter displacement is accurately exported by dial gauge, thus effectively overcome in prior art when measuring rotor airgap, by doing the marking at clearance gauge smearing chalk dust, use the multiple artificial cumulative errors of vernier caliper measurement reading again, improve measurement Efficiency and accuracy.
(2) not only structure is simple in the present invention, and realization is convenient, with low cost, compared with prior art, possesses novelty and creativeness, and has very high practical value, for it is applied on a large scale, established solid foundation.
Accompanying drawing explanation
Fig. 1 is cut-open view of the present invention.
Reference numeral title corresponding in accompanying drawing is as follows:
1-dial gauge, 2-regulate support, 3-sliding sleeve, 4-lock-screw, 5-tooth bar, 6-upper limit position block, 7-slide rule groove, 8-gear pair, 9-wedge block, 10-sliding sleeve operating grip, 11-lower position block, 12-clearance gauge seat.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described, and embodiments of the present invention include but not limited to the following example.
Embodiment
As shown in Figure 1, present embodiments provide a kind of hydroelectric generating set rotor measurement of air gap clearance gauge, this measurement of air gap clearance gauge mainly comprises dial gauge, clearance gauge seat, wedge shape measurement section and sliding part and forms, wherein, dial gauge adopts the dial gauge of existing maturation, and dial gauge is made up of gauge head, gauge rod, sleeve, antirattle spring, tooth bar, gear, hairspring, round dial and pointer etc. usually.Clearance gauge seat is hollow structure; its shape is not particularly limited; should not limit the protection domain of the application to the shape profiling of clearance gauge seat in the present patent application Figure of description; the upper end of dial gauge by regulating support 2 to be fixed on clearance gauge seat; regulate support in " L " type, during application, regulate support to be connected with clearance gauge seat compared with the end of minor face; longer sides is for clamping the sleeve portion of dial gauge, and it is inner that the gauge rod of dial gauge 1 and gauge head portion stretch to clearance gauge seat 12.Regulate support can fix dial gauge on the one hand, on the other hand, dial gauge can be realized by regulating support and carry out up-down adjustment relative to clearance gauge seat.
Wedge shape measurement section is used for when actual measurement, extend into clearance measurement depth location place, therefore wedge shape measurement section should be arranged at the clearance gauge seat lower end relative with dial gauge position.Specifically, wedge shape measurement section comprises with lower member:
Wedge shape measurement section comprises wedge block 9, slide rule groove 7 and tooth bar 5; Slide rule groove 7 is fixedly connected on clearance gauge seat 12 lower end and is communicated with clearance gauge seat 12 inside, and wedge block 9 inserts in slide rule groove 7, and be connected to one structure, the other end of one end of tooth bar 5 and wedge block 9 stretches to clearance gauge seat 12 inside; Wherein, the featheredge thickness of wedge block is 10mm, and gradient is 1:10; The chute thickness of slide rule groove is 10mm.Wedge block is inserted in the chute of slide rule groove, and can do relative to slide rule groove and move linearly up and down.
Sliding position in dial gauge 1 gauge rod and survey lower head can moving linearly relative to clearance gauge seat about 12.Specifically, sliding part comprises that to be arranged at clearance gauge seat 12 inner and be positioned at the gauge rod of dial gauge 1 and survey lower head and sliding sleeve 3 in inverse u shape, the side inwall of sliding sleeve 3 vertical direction is provided with the internal tooth of bar shaped, preferably, sliding sleeve operating grip 10 is positioned at homonymy with the internal tooth of sliding sleeve 3, tooth bar 5 is connected with the internal tooth of sliding sleeve 3 by gear pair 8, and sliding sleeve 3 is also provided with the sliding sleeve operating grip 10 that one end extends to clearance gauge seat 12 outside.Sliding sleeve realizes its movement relative to clearance gauge seat by moving up and down of sliding sleeve operating grip, simultaneously, based on the structure of sliding part, wedge block coordinates realization relative to moving up and down of slide rule groove by sliding sleeve, gear pair and tooth bar, wherein, the effect of gear pair is, is displaced through after gear pair reduces by larger for wedge block amplitude, be passed to dial gauge, to guarantee the accuracy of reading.The shape of sliding sleeve, except above-mentioned " U " font, also can be set to the shape such as " 7 " font, " recessed " font.
In order to ensure the normal use of this measurement of air gap clearance gauge, the moving up and down of sliding sleeve should have certain spacing, therefore, the present embodiment is also respectively arranged with upper limit position block 6 and lower position block 11, for limiting the upper and lower maximum displacement of sliding sleeve in two positions up and down of clearance gauge seat 12 inside.
When measuring, sliding sleeve moves up and down relative to clearance gauge seat, and when reading, sliding sleeve need be fixed, the present embodiment fixes sliding sleeve by lock-screw 4.Lock-screw is by penetrating clearance gauge seat, and then compress sliding sleeve and realize fixing, in another embodiment, lock-screw is connected with the side of sliding sleeve after penetrating clearance gauge seat again, also can realize the fixing of sliding sleeve thus.
In actual measurement operation, although the upper end of tooth bar is moved in sliding sleeve, but when measuring stroke longitudinal direction that is comparatively large and sliding sleeve and being highly lower, the upper end of tooth bar can prop up the base of sliding sleeve unavoidably, to cause the range of measurement of air gap clearance gauge to reduce, therefore, the present embodiment also offers the through hole that can penetrate for tooth bar 5 on the horizontal base of sliding sleeve 3, thus, the length travel amount of tooth bar is just no longer by longitudinal height limitation of sliding sleeve.
A using method for hydroelectric generating set rotor measurement of air gap clearance gauge, comprises the following steps:
(1) before measuring, carry out zero-bit adjustment: the operating grip promoting sliding sleeve downwards, moves to the position of lower position block by sliding sleeve, after regulating dial gauge to keep 40mm decrement, dial gauge pointer is to zero;
(2) when measuring, find rotor magnetic pole center accurately, the inclined-plane of wedge block is aligned stator core, insert slide rule groove to clearance measurement depth location, the upwardly operating grip of sliding sleeve, moved linearly downwards in slide rule groove by gear pair, rack drives wedge block, after magnetic pole and stator core surface of contact are close in the slide rule groove back side and wedge block inclined-plane, to tighten after lock-screw reading on dial gauge.
According to above-described embodiment, just the present invention can be realized well.What deserves to be explained is; under prerequisite based on above-mentioned design concept; for solving same technical matters; even if some making on architecture basics disclosed in this invention are without substantial change or polishing; the essence of the technical scheme adopted is still the same with the present invention, therefore it also should in protection scope of the present invention.
Claims (10)
1. a hydroelectric generating set rotor measurement of air gap clearance gauge, it is characterized in that, comprise dial gauge (1), the clearance gauge seat (12) of hollow, described dial gauge (1) is fixed on described clearance gauge seat (12) upper end by regulating support (2), and it is inner that the gauge rod of described dial gauge (1) and gauge head portion stretch to described clearance gauge seat (12);
Described clearance gauge seat (12) lower end is provided with the wedge shape measurement section for inserting clearance measurement depth location;
Be provided with in described clearance gauge seat (12) inside with described wedge shape measurement section with the use of sliding part, described sliding position in described dial gauge (1) gauge rod and survey lower head can moving linearly up and down relative to described clearance gauge seat (12).
2. a kind of hydroelectric generating set rotor measurement of air gap clearance gauge according to claim 1, is characterized in that, described wedge shape measurement section comprises wedge block (9), slide rule groove (7) and tooth bar (5); Described slide rule groove (7) is fixedly connected on described clearance gauge seat (12) lower end and is communicated with described clearance gauge seat (12) inside, described wedge block (9) inserts in slide rule groove (7), and be connected to one structure, the other end of one end of described tooth bar (5) and described wedge block (9) stretches to described clearance gauge seat (12) inside; Described wedge shape measurement section by described tooth bar (5) and described sliding part with the use of.
3. a kind of hydroelectric generating set rotor measurement of air gap clearance gauge according to claim 2, it is characterized in that, described sliding part comprises that to be arranged at described clearance gauge seat (12) inner and be positioned at the gauge rod of described dial gauge (1) and survey the sliding sleeve (3) of lower head, the side inwall of described sliding sleeve (3) vertical direction is provided with the internal tooth of bar shaped, described tooth bar (5) is connected by the internal tooth of gear pair (8) with described sliding sleeve (3), described sliding sleeve (3) is also provided with one end and extends to the outside sliding sleeve operating grip (10) of described clearance gauge seat (12).
4. a kind of hydroelectric generating set rotor measurement of air gap clearance gauge according to claim 3, is characterized in that, described sliding sleeve (3) keeps relative fixing by lock-screw (4) with described clearance gauge seat (12).
5. a kind of hydroelectric generating set rotor measurement of air gap clearance gauge according to claim 4, it is characterized in that, also comprise and be arranged at the upper limit position block (6) that described clearance gauge seat (12) inside is positioned at described sliding sleeve (3) top and the lower position block (11) be positioned at below described sliding sleeve (3).
6. a kind of hydroelectric generating set rotor measurement of air gap clearance gauge according to claim 5, is characterized in that, the horizontal base of described sliding sleeve (3) also offers the through hole that can penetrate for described tooth bar (5).
7. according to a kind of hydroelectric generating set rotor measurement of air gap clearance gauge that claim 6 is stated, it is characterized in that, described sliding sleeve operating grip (10) is positioned at homonymy with the internal tooth of described sliding sleeve (3).
8. a kind of hydroelectric generating set rotor measurement of air gap clearance gauge according to claim 3 to 7 any one, it is characterized in that, described gear pair is single gear transmission, ratio of gear i=0.1.
9. a kind of hydroelectric generating set rotor measurement of air gap clearance gauge according to claim 8, is characterized in that, the featheredge thickness of described wedge block (9) is 10mm, and gradient is 1:10; The chute thickness of described slide rule groove (7) is 10mm.
10. the using method of a kind of hydroelectric generating set rotor measurement of air gap clearance gauge according to claim 1 to 8 any one, is characterized in that, comprise the following steps:
(1) before measuring, carry out zero-bit adjustment: the operating grip promoting sliding sleeve downwards, moves to the position of lower position block by sliding sleeve, after regulating dial gauge to keep 40mm decrement, dial gauge pointer is to zero;
(2) when measuring, find rotor magnetic pole center accurately, the inclined-plane of wedge block is aligned stator core, insert slide rule groove to clearance measurement depth location, the upwardly operating grip of sliding sleeve, moved linearly downwards in slide rule groove by gear pair, rack drives wedge block, after magnetic pole and stator core surface of contact are close in the slide rule groove back side and wedge block inclined-plane, to tighten after lock-screw reading on dial gauge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510261756.6A CN105115393B (en) | 2015-05-21 | 2015-05-21 | A kind of hydroelectric generating set rotor measurement of air gap clearance gauge and its application method |
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| CN201510261756.6A CN105115393B (en) | 2015-05-21 | 2015-05-21 | A kind of hydroelectric generating set rotor measurement of air gap clearance gauge and its application method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105823397A (en) * | 2016-05-05 | 2016-08-03 | 广西桂冠电力股份有限公司大化水力发电总厂 | Hydro-generator set air gap measuring method and measuring device |
| CN107356187A (en) * | 2017-07-11 | 2017-11-17 | 哈尔滨工程大学 | A kind of eccentric measure device of motor gas-gap |
| CN107643549A (en) * | 2017-10-13 | 2018-01-30 | 国电大渡河流域水电开发有限公司龚嘴水力发电总厂 | Contactless generating set air gap foreign matter on-line checking alarm structure and alarm method |
| CN108267066A (en) * | 2018-01-25 | 2018-07-10 | 华意压缩机股份有限公司 | Special tool for checking air gap of stator and rotor of motor of refrigerator compressor |
| CN113865468A (en) * | 2021-11-16 | 2021-12-31 | 国网四川省电力公司映秀湾水力发电总厂 | Special dipperstick of motor stator rotor air gap |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107643549A (en) * | 2017-10-13 | 2018-01-30 | 国电大渡河流域水电开发有限公司龚嘴水力发电总厂 | Contactless generating set air gap foreign matter on-line checking alarm structure and alarm method |
| CN107643549B (en) * | 2017-10-13 | 2024-03-01 | 国能大渡河流域水电开发有限公司龚嘴水力发电总厂 | Non-contact type generator set air gap foreign matter on-line detection alarm structure and alarm method |
| CN108267066A (en) * | 2018-01-25 | 2018-07-10 | 华意压缩机股份有限公司 | Special tool for checking air gap of stator and rotor of motor of refrigerator compressor |
| CN113865468A (en) * | 2021-11-16 | 2021-12-31 | 国网四川省电力公司映秀湾水力发电总厂 | Special dipperstick of motor stator rotor air gap |
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Address after: 614000 No.99 Gongdian Avenue, Shawan District, Leshan City, Sichuan Province Patentee after: Gongzui Hydropower Station of Guoneng Dadu River Basin Hydropower Development Co.,Ltd. Address before: 614000 No.99 Gongdian Avenue, Shawan District, Leshan City, Sichuan Province Patentee before: GONGZUI HYDROELECTRIC POWER GENERAL FACTORY OF CHINA GUODIAN DADU RIVER BASIN HYDROPOWER DEVELOPMENT Co.,Ltd. |